public class StringTest {
    public static void main(String[] args) {
        String s1 = "20175316盛茂淞";
        StringBuffer s2 = new StringBuffer("20175316盛茂淞");
        StringBuilder s3 = new StringBuilder().append("20175316").append("盛茂淞");
        System.out.println(s1);
        System.out.println(s2);
        System.out.println(s3);
    }
}
